class_docstr: Gini Impurity split criterion.
code: def range_of_merit(pre_split_dist):
      return 1.0
  
file_path: river/river/tree/split_criterion/gini_split_criterion.py
imports: from __future__ import annotations
  import math
  from .base import SplitCriterion
label_desc: Use image node_id 4 for calling the GiniSplitCriterion obj's underlying member method code with example usage: obj.range_of_merit(pre_split_dist) and returns: int